Is AVCHD your requirement?u can get so many other options but recording at h.264 .mp4 GoPro / Dji Osmo Action comes to mind.* then convert to AVCHD

No need to worry about autofocus with these.Angle of view is wider , can adjust the fisheye or de-fisheyed view.Also if shot in 4k, can further crop.

Else, find a good phone with IP waterproof rating, i only had experience with Samsung s5/s7/s10e.i would vouch for those. convenience too just bring your phone and not additional camera.

Your advices and suggestions are so much appreciated! AVCHD, I love it for its storage wise. Means, fine small enough, haha. GoPro / Dji? Can get it with only RM1K+-?With such little budget, any action cam should I consider?

Your advices and suggestions are so much appreciated! AVCHD, I love it for its storage wise. Means, fine small enough, haha. GoPro / Dji? Can get it with only RM1K+-?With such little budget, any action cam should I consider?

Sub rm1k , probably can get an older version of GoPro. Hero 5 or Hero 6 or Hero 7 (not black one)

But if u can fork a little bit more, lets say rm1.5k Gopro Hero 7 black or DJI Osmo Action would be best & will last you for a very long time.Mainly for the stabilization feature.Its really2 good

Yeah AVCHD has smaller bitrate file.Not sure if can change bitrate on gopro, but on dji action cannot.On phone, u can buy 3rd party app like Filmic Pro and choose the quality u want.imho, memory cards & storage are getting cheaper now too haha.Or later uplaod youtube and delete from your pc/laptop.